PT Indosat Tbk, established in 1967, is a telecommunications company based in Indonesia. The company's services include multimedia, internet telephony, wireless telecommunication networks, and fixed telecommunication networks. It also deals in payment transactions and money transfer services. Indosat provides fixed voice services (fixed wireline and fixed wireless) and mobile services (3 pre-paid and 2 post-paid brands) to approximately 58.5 million subscriptions across Indonesia (Dec 2012). The company provides Internet and data communication services to corporate and retail customers in Indonesia.It also offers its i-ring service for mobile users to download content.The Company had 11 subsidiaries which are all engaged in finance and telecommunication services.

For the year ended December 2012, PT Indosat Tbk achieved revenues of IDR 22,718,500 million (annual growth of 10.4%) and net profit of IDR 3,210,800 million (annual growth of 4.3%).